11511511552 has 20 divisors (see below), whose sum is σ = 23000540706. Its totient is φ = 5755755520.

The previous prime is 11511511507. The next prime is 11511511567. The reversal of 11511511552 is 25511511511.

It can be written as a sum of positive squares in only one way, i.e., 8585134336 + 2926377216 = 92656^2 + 54096^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 11511511552.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11241199 + ... + 11242222.

Almost surely, 2^11511511552 is an apocalyptic number.

It is an amenable number.

11511511552 is a deficient number, since it is larger than the sum of its proper divisors (11489029154).

11511511552 is an frugal number, since it uses more digits than its factorization.

11511511552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22483439 (or 22483423 counting only the distinct ones).

The product of its digits is 1250, while the sum is 28.

The spelling of 11511511552 in words is "eleven billion, five hundred eleven million, five hundred eleven thousand, five hundred fifty-two".